Page 523 - Air Pollution Control Engineering

12_ch_wang.qxd 05/05/2004 5:27 pm Page 490
490 Lawerence K. Wang et al.

F Percentage of fine particles < 3 µm
F Buoyant force
B
F Drag force
D
F Gravitational force
G
F´ Liquid flow rate
f Fanning friction factor
g Gram, or gravitation acceleration
G Gas flow rate
g Gravitation acceleration constant
c
h Height
H Enthalpy
HC Hydrocarbon
HCHO Formaldehyde
K Boltzmann’s constant
K´ Overall mass transfer coefficient
k Constant
L Length, or percentage of layer particles over 3µm
LDV Light-duty vehicle
LDT1 Light-duty truck 1
LDT2 Light-duty truck 2
l length
L´ Liquid-to-gas ratio
M Slope of equilibrium line
MgO Magnesium oxide
N Number; number of strokes per minutes, or number density
N Drop concentration, or initial drop number density
0
n Particle number density
N Number of overall gas transfer units
OG
NMHC Nonmethane hydrocarbon
NMOG Nonmethane organic gases
NO Nitrogen oxide
NO Nitrogen oxides
x
p Pressure
pH Log hydrogen ion concentration
q Charge on particle
Q Heat energy, or charge on droplet
Q Boiler heat input
boiler
R Radial distance or radius of wet spherical droplet
R Radial distance to liquid of boiler
B
R Radial distance to liquid of condenser
C
Re Drop Reynolds number
SO Sulfur dioxide
2
T Absolute temperature
THC Total hydrocarbon
U Mean gas velocity